@arush The letter asks for three things:

State that you do not qualify for citizenship is not enough; the truth is that you and your ancestors are white.
We ask you to explain that only tribal affiliation and kinship determine Native identity, and that equating Native identity with race and biology erodes the foundation of Indigenous sovereignty.
Clearly state that Native people are the sole authority on who—and who is not—Native.
In her 12 page response, she said:

“I am not a person of color; I am a white woman, and that is how I identify.”
“I have said very publicly—and will continue to say—that DNA does not determine tribal citizenship.”
“I am not a tribal citizen. Tribal Nations—and only Tribal Nations—determine tribal citizenship. It’s their right as a matter of sovereignty, and they exercise that in the ways they choose to exercise it.
Working with Congresswoman Deb Haaland, she’s released a detailed plan for the federal government to comprehensively live up to its obligations and make amends for its past failures. She’s also consistently sponsored and pushed legislation supported by Native American tribes.

The sticking point for these letter writers seems to be that she has not explicitly said that her family stories were false. I can understand not wanting to outright state that one’s dead mother was a liar.

While that sticking point is enough of a reason for the letter writers to not forgive Warren, is their individual dissatisfaction reason enough to make this a national story? And for those stories to not mention the many Native American individual and groups that have begun to forgive her and think that she is doing the work to make up for her errors?

Why would we expect every Cherokee and every other Native Americans to forgive Warren? And why is the fact that these 200 have not a major news story?

Would 200 African Americans writing another letter to Biden about his friendship with segregationist Senators receive the same coverage?

And I don’t think asking that question is wrong, it’s completely possible for both Warren causing a lot of harm and the news media being sexist to be true. It feels off to allow the former to completely overshadow the latter.